{
  "manageEntity": {
    "action": "Save",
    "entityId": "1347196354",
    "entityType": "Track",
    "nonce": "0xec77917a6c985e80a32ad21c0e306ebf1c434f50137ec5ab6279e7ff82770d45",
    "signature": "0x92bd04565a65ffba241747a755dc5600a017a99e4ed7d29119229b7dd092c828664bfff18bcb0cab5a09f4db1c286c8053b095e66932fc5e0ffe64cc3c9e71f51c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}